An astronomical symbol is like a secret code that astronomers use to represent planets, stars, and other space things. These symbols are like pictures that help astronomers describe and document what they see in the universe using symbols instead of words.
For example, the symbol for the planet Venus looks like a circle with a cross in the middle, while the symbol for the planet Mercury looks like the astrological sign for male (a circle with an arrow pointing upwards).
These symbols help scientists communicate more easily and clearly about space objects and characteristics, making it easier for them to understand and study the universe.